催化剂制备与研究热解温度对自模板法制备纳米催化剂催化活性的影响

金属有机骨架材料(MOFs)作为典型的自模板材料已被广泛应用于催化、电化学和吸附等领域。采用水热法合成两种含氮的Co-Ni-MOF和Co-Cu-MOF材料,并以两种材料为模板剂,在不同温度热解制备Co-Ni@NC和Co-Cu@NC纳米催化剂。将两种纳米催化剂用于乙基苯选择性氧化制备苯乙酮反应, 研究热解温度对催化剂催化活性的影响。结果表明,随着热解温度升高,催化活性逐渐增强,当热解温度达到900 ℃时,催化活性最高,苯乙酮收率为98%~99%,催化剂还表现出较好的重复使用性能。

Influence of pyrolysis temperatures on catalytic activity of nanocatalysts prepared by self-template method

As the typical self-template materials,metal-organic frameworks(MOFs) have been widely used in catalysis,electrochemistry,adsorption and other fields.Two kinds of nitrogen-containing materials Co-Ni-MOF and Co-Cu-MOF were synthesized by hydrothermal method.Using these materials as self-templates,Co-Ni@NC and Co-Cu@NC nanocatalysts were prepared by calcining these materials at different thermolysis temperatures.Subsequently,Co-Ni@NC and Co-Cu@NC nanocatalysts were used for selective oxidation of ethylbenzene to acetophenone.The influence of thermolysis temperatures on catalytic activity of the catalysts was investigated.The experimental results indicated that the activity of the catalysts was improved gradually with the increase of pyrolysis temperatures.When the pyrolysis temperature was 900 ℃,the catalysts exhibited optimal activity for selective oxidation of ethylbenzene,and acetophenone yield was 98%-99%.The catalysts also demonstrated good reusability.